Laundry detergent compositions containing lipolytic enzyme and amines

- Procter & Gamble Company

The present invention relates to laundry detergent compositions containing a lipolytic enzyme (lipase) and specially selected primary and/or tertiary amines. The compositions provide enhanced cleaning of grease/oil soils and stains, particularly when used in a pre-treat laundering process for cleaning fabrics stained with grease/oil soils.

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Claims

1. A liquid laundry detergent composition comprising the following:

(A) a lipase enzyme at a level of 2 to 20,000 LU/g;
(B) 1% to 40% of a surfactant; and
(C) a tertiary amine having the formula R.sub.1 R.sub.2 R.sub.3 N wherein R.sub.1 and R.sub.2 are C.sub.1 -C.sub.8 alkyl chains or ##STR7## wherein R.sub.5 is H or C.sub.1 or C.sub.2 alkyl and x is an integer between 1 and 6; R.sub.3 is R.sub.4 X(CH.sub.2).sub.n wherein X is --NH--, R.sub.4 is a C.sub.4 -C.sub.12 alkyl chain, and n is 2 or 3.

2. The liquid detergent composition according to claim 1 wherein said lipolytic enzyme is a lipase enzyme which is a mutant lipase enzyme comprising the D96L mutation.

3. The liquid detergent composition according to claim 2 wherein said mutant lipase enzyme is a mutated enzyme D96L derived from Humicola lanuginosa.

4. The liquid detergent composition according to claim 3 wherein said mutated enzyme D96L is present in said composition at a level such that the mutated enzyme D96L is present in a wash solution including said composition at a level from 50 LU to 8500 LU per liter of said wash solution.

5. The liquid detergent composition according to claim 4 wherein said mutated enzyme D96L is present in said composition at a level such that the mutated enzyme D96L is present in a wash solution including said composition at a level from 100 LU to 7500 LU per liter of said wash solution.

6. The liquid detergent composition according to claim 5 wherein said mutated enzyme D96L is present in said composition at a level such that the mutated enzyme D96L is present in a wash solution including said composition at a level from 150 LU to 5000 LU per liter of said wash solution.

7. The liquid detergent composition according to claim 1 wherein said mutated enzyme D96L is present in said composition at a level from about 10 to about 6,000 LU/g of said composition.

8. The liquid detergent composition according to claim 7 wherein said mutated enzyme D96L is present in said composition at a level from about 200 to about 2,000 LU/g of said composition.

9. The liquid detergent composition according to claim 1 wherein said composition further comprises water.

10. The liquid detergent composition according to claim 9 wherein said composition comprises less than 50% by weight of water.

11. The liquid detergent composition according to claim 10 wherein said composition comprises less than 30% by weight of water.

12. The liquid detergent composition according to claim 1 wherein said composition further comprises an ingredient selected from the group consisting of builders, enzymes, and mixtures thereof.

13. A method for laundering greasy/oily stained fabrics in need of laundering comprising contacting said fabrics with an aqueous solution comprising a liquid laundry detergent composition comprising:

(A) a lipase enzyme at a level of 2 to 20,000 LU/g of said composition;
(B) 1% to 40% of a surfactant; and
(C) a tertiary amine having the formula R.sub.1 R.sub.2 R.sub.3 N wherein R.sub.1 and R.sub.2 are C.sub.1 -C.sub.8 alkyl or ##STR8## wherein R.sub.5 is H or C.sub.1 and C.sub.2 alkyl and x is an integer between 1 and 6; R.sub.3 is R.sub.4 X(CH.sub.2).sub.n wherein X is --NH--, R.sub.4 is a C.sub.4 -C.sub.12 alkyl chain, and n is 2 or 3.

14. A method for pretreating fabrics having greasy/oily stains comprising contacting said greasy/oily stains with a liquid detergent composition comprising:

(A) a lipase enzyme at a level of 2 to 20,000 LU/g of said composition;
(B) 1% to 40% of a surfactant; and
(C) a tertiary amine having the formula R.sub.1 R.sub.2 R.sub.3 N wherein R.sub.1 and R.sub.2 are C.sub.1 -C.sub.8 alkyl chain or ##STR9## wherein R.sub.5 is H or C.sub.1 or C.sub.2 alkyl and x is an integer between 1 and 6; R.sub.3 is R.sub.4 X(CH.sub.2).sub.n wherein X is --NH--, R.sub.4 is a C.sub.4 -C.sub.12 alkyl chain and n is 2 or 3.

15. The method according to claim 14 wherein said greasy/oily stains are contacted by said liquid detergent composition for from about 30 seconds to about 24 hours.

16. The method according to claim 15 wherein said greasy/oily stains are contacted by said liquid detergent composition for from about 1 to about 180 minutes.

Referenced Cited
U.S. Patent Documents
3755085 August 1973 Tivin et al.
4728453 March 1, 1988 Choy
4758378 July 19, 1988 Raemdonck et al.
4846980 July 11, 1989 Upadek et al.
4867895 September 19, 1989 Choy
5019292 May 28, 1991 Baeck et al.
5068064 November 26, 1991 Proietto et al.
5308513 May 3, 1994 Harmalker et al.
Foreign Patent Documents
0171006 February 1986 EPX
0171006 December 1986 EPX
0588413 March 1994 EPX
86/07603 December 1986 WOX
92/05249 September 1991 WOX
92/05249 April 1992 WOX
Patent History
Patent number: 5935271
Type: Grant
Filed: Aug 11, 1997
Date of Patent: Aug 10, 1999
Assignee: Procter & Gamble Company (Cincinnati, OH)
Inventors: Dimitris Lappas (Strombeek-Bever), Rajan Keshav Panandiker (Cincinnati, OH), Thomas Wilhelm Horner (Overijse), Robert Walter Boswell (Indian Springs, OH)
Primary Examiner: Kery Fries
Attorneys: C. Brant Cook, Kim W. Zerby, Jacobus C. Rasser
Application Number: 8/817,154